Linear permanent magnet motor operating mechanism of high-voltage circuit breaker

Abstract

The invention relates to a linear permanent magnet motor operating mechanism of a high-voltage circuit breaker, comprising a stator core, a rotor core, drive rods and permanent magnets, wherein the stator core is a box body; the rotor core is arranged in the stator core; the drive rods arranged on both ends of the rotor core penetrate through shells positioned on the upper and the lower ends of the rotor core and can move up and down; the side wall of the stator core is provided with the permanent magnets; upper and lower adjacent permanent magnets are opposite in polarity; the permanent magnets positioned on the left and the right edges of the box body are same in polarity placement directions; stator salient poles with the number of integral multiples of a phase number are arranged on the inner side wall of the stator core and between the two adjacent permanents and are provided with armature coils; the outer side wall of the rotor core is provided with rotor salient poles; when therotor core is positioned on a highest position, the stator salient pole positioned on the uppermost end of the stator core just faces to the rotor salient poles; and when the rotor core is positionedon a lowest position, the stator salient pole positioned on the lowest end of the stator core just faces to the rotor salient poles.

Description

technical field [0001] The invention belongs to the technical field of switchgear in electrical engineering, and in particular relates to a linear permanent magnet motor operating mechanism of a high-voltage circuit breaker. Background technique [0002] The operating mechanisms of traditional high-voltage circuit breakers mainly include hydraulic mechanisms, pneumatic mechanisms, spring mechanisms and electromagnetic mechanisms. The hydraulic operating mechanism has a series of advantages such as high energy intensity, fast response, low noise, and reliable action. The pneumatic operating mechanism uses compressed air as an energy source to generate thrust, and does not require high-power DC power supply or laying control cables. Pneumatic and hydraulic systems can meet the long-stroke and high-power operation requirements, and are mainly used in high-voltage circuit breakers with high voltage levels. However, the system is complex and the reliability is not high enough. Th...

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Problems solved by technology

[0005]Technical problem: the invention aims at the short stroke of traditional electromagnetic, spring and permanent magnet mechanisms, which is difficult to meet the long-stroke opening and closing operation requirements of high-voltage circuit breakers. To solve the problem that the closing operation is difficult to guarantee, a long-stroke linear permanent magnet motor operating mechanism is provided to meet the opening and closing operation requirements of long-stroke high-voltage circuit breakers under the condition of outputting a certain electromagnetic operating force

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